Electrically-controlled lock.



H. G. VOIGHT.

ELECTRIGALLY CONTROLLED LOCK. APPLICATION FILED APR.5, 1913.

1,071,657, Patented Aug.26, 1913.

3 SHBETSSHEET 1.

Ezgiwi/iwvwwz awn tom COLUMBIA PLANDGRAPH co., WASHINGTON. D. c.

H. G. VOIGHT. ELEGTRIOALLY CONTROLLED LOOK. APPLICATION FILED Alum,1913.

3 SHEETSSHEET 2.

ammo/41km Haw/ear Patented Aug. 26, 1913.

H. G, VOIGHT.

ELEGTRIGALLY CONTROLLED LOOK.

APPLICATION FILED APR.5, 1913.

Patented Aug. '26, 1913.

3 SHEETS-SHEET 3.

COLUMBIA PLANDORAPH COqWASHINGTON, D. C.

HENRY G. VOIGHT, OF NEW BRITAIN, CONNECTICUT.

ELECTRICALLY-CONTROLLED LOCK.

Specification of Letters Patent.

Application filed April 5, 1913.

Patented Aug. 26,1913.

Serial No. 759,183.

To all whom it may concern 7 blocked. Such an instance is seen in thecase of looks as applied to the corridor doors in hotels. A guest withvaluables displayedin his room may desire to leave his room with suchvaluables on display and to lock the uoor against opening by any onewithout authority. To this end I have devised blocking means for a lockof this type, which means are under electric control and may be operatedfrom a distant point, as the hotel ofiice, to block the retraction ofthe bolt which has previously been projected by the occupant of the roomon leavlng, the door being then locked against all save one special key.These and other advantages w ill be apparent from the more detaileddescription following, taken in connection with the ac-. companyingdrawings forming part thereof and illustrating one embodiment of theinvention.

In these drawings: Figure 1 is a view in elevation of a lock embodyinthe present invention, the cover plate of t e lock casing being removedand certain of the usual parts of the mechanism being omitted, and theelectrically controlled blocking means being shown in latched orinoperative position. Fig. 2 is a View in end elevation of the lockmechanism shown in Fig. 1, part of the lock casing being broken away todisclose the interior arrangement. Fig. 3 is a fragmentary view inelevation of the interior of the lock case, the blocking means beingshown in operative or unlatched position. Fig. 4 is a detail of the deadbolt. Fig. 5 is afragmentary View of the interior of the lock caseshowing in detail the electric control. Fig. 6 is a fragmentary verticalsectional View through the lock case showing in elevation the partsdisclosed in Fig. 5. Fig. 7 is a top plan View of the parts shown inFig. 5 with the upper face of the lock case broken away to disclose theinterior arrangement. Fig. 8 is a detail View of the latching armature.Fig. 9 shows in side and end elevation the armature-controlled blockingdog.

Referring to the drawings by numerals, 1 indicates a lock case and 2 theface plate thereof. At 3 I have indicated the opening in the case forthe knob-controlled roll-back which cooperates with any suitable form oflatch bolt and dogging or night latch mechanism. As these, specifically,form no part of the present invention, I have not deemed it necessary toillustrate the same.

4 indicates a dead bolt suitably guided in the lock case and having itsupper edge notched as at 5 to receive the usual offset of a tumbler 9 ofthe spring pressed type, pivotally mounted on a stud 6 and gated asusual. The dead bolt is provided with an extension 7 at its lower edgeprovided with an elongated slot 8 therein. A sliding plate 10 carries apin on its under face which enters in the slot 8 and has a pivot stud 11adjacent its upper end and a lower horizontally extending arm 12arranged in parallel with the dead bolt. The upper edge of thishorizontal extension is provided with a series of pms 13 formlng a rack.A second tumbler 14 of the usual spring-pressed type, gated as usual, ismountedon the. pivot stud 1 1 and is provided at its lower end with ahorizontally extending arm 15 positioned adjacent the rack pins 13 oftheplate 10. The plate 10 forms in effect an operative part of the deadbolt 4 and cooperates therewith to project said bolt, this plate beingactuated by means of a thumb turn mechanism hereinafter described. Bothof the tumblers 9 and 14 are gated to coiiperate with a fixed fence 26,the tumbler 14 acting as an emergency tumbler. This tumbler is providedwith means adapted upon depression of said tumbler to cooperate with thetumbler 9 and depress that tumbler also, as is known in the art, thetumbler 9 being depressible, however, independently of the second oremergency tumbler 14.

The thumb turn mechanism referred to may comprise the thumb turn hub '16carrying, to rotate therewith, a toothed quadrant 17 located in theplane of the rack pins 13 and a roll-back arm 18 located in the plane ofthe arm 15 of the tumbler 14. When thus hub 16 is rotated. by a suitableT- piece, or thumb turn (not shown), the emergency tumbler and theprimary tumbler will at 19, and the lower end of a link 20 is pivotedthereto, the upper end of this link being slotted as at 21 and beingguided upon a pin 22 suitably secured to the lock case.

23 designates the barrel of a cylinder lock mechanism carrying aroll-back or cam 24: positioned in the plane of the offset of theprimary tumbler 9 and adapted to operate said tumbler mechanism and toproject and retract the dead bolt. This roll-back is controlled by aseries of keys which are, of course, arranged to cooperate with thetumbler mechanism of the lock. 25 designates a second. roll-back or cammember arranged in a different plane from the rollback 241 and operatedby one special key bitted to operate the tumbler mechanism and ofgreater length than the other key or keys of the series so that thislong key may engage the lower end of the second rollback 25 and move itrelatively to the firstroll-back and to the barrel of the cylinder lock.A spring normally holds this second roll-back in a plane where it willnot engage the second tumbler 14; when the roll-back is operated, butwhen the special or long key is used, this position of the secondrollback is changed and it is moved to a position where it will rotatein an arc intersecting the tumbler 14 and operating said tumbler and itsslide 10 to project and retract the dead bolt independently of the firstroll-back and of the thumb turn mechanism.

I have only briefly described these parts of the lock mechanism, asspecifically they form no part of the present invention and are thesubject-matter of my pending application Serial No. 755,101, filed March18th, 1913. The present invention is not limited to this specificstructure, but is particularly adapted to the general combination ofelements which are heretofore described.

It will be evident from the foregoing description that the dead bolt 4may be projected and retracted through the roll-back 24 and a series ofkeys, and may be projected from the interior through the thumb turnmechanism and the co operating tumbler 14: and slide 10 to dead lock thebolt against retraction from the exterior through any of the aforesaidseries of keys operating the roll-back 24c alone. The special or longkey operates the tumbler 14 from the exterior of the door to retract thelatch bolt when projected by the thumb turn from the interior. Incombination with this general type of look I have provided means underelectric control and operable from the exterior of the room and, ifdesired,from a distant point, whereby the dead bolt may be projected andmay be blocked against retraction by any of the series of keys operatingthe roll-back 24 only, this blocking means being rendered inoperative,however, through the special or long key and second roll-back 25 topermit the retraction of said dead bolt. To that end I have provided thefollowing structure: The dead bolt t is provided with a shoulder 27 inits upper edge. Cooperating with this shoulder is a locking dog 28pivoted adjacent one end as at 29 to the lock case and provided at itsforward end with a lateral offset 31 whose forward upper edge is beveledand extends beyond the forward edge of the body of the dog. At its lowerforward edge and within the edge of the body of the dog is a lateraloffset lug 30. Acoiled spring 32 is suitably mounted on the lock case inthe plane of the body of the dog 28 and has its free end bearing againstsaid dog adjacent its forward upper edge so that said spring normallytends to position said dog with its offset lug 30 moved downwardly inthe plane of and to the rear of the abutment shoulder 28 of the deadbolt. The rear end of the dog 28 is beveled and is positioned to liewithin the are of movement of the second roll back 25 when the latterhas been moved out wardly by this special key so that it will be evidentthat through said key and said second roll-back 25 therear end of thedog may be engaged and its forward end with its blocking lug 30 liftedout of the path of bolt retraction. Mounted within the lock casing andsuitably insulated therefrom are a pair of electro-magnets 33 havingeonnecting wires 34; 35 in circuit with a suitable source of electriccurrent, said circuit containing a circuit closer which may be locatedin the office of the hotel, for instance. Cooperating with theseelectro-magnets is what I will term a latching armature 36 havinghinging pins 37 at its opposite ends by means of which it is suitablyhinged to the lockcasing. Adjacent its lower outer or free edge thisarmature 36 is provided with a latching window 38 which is positioned inthe line of the beveled edge 31 of the latching dog when the latter israised, and is adapted to receive said forward beveled edge of theoffset 31 (see Figs. 1 and to normally hold said blocking dog in raisedinoperative position. The lower edge of the armature, when not attractedby its electromagnets, is positioned to rest above this forward bevelededge of the dropped or unlatched blocking dog. Suitable means, as acoiled spring 39, normally tends to hold this armature out of contactwith the electromagnets, as is usual.

WVith the structure described in mind, the manner of controlling thelocks is as follows:'Let us suppose that the occupant of the room hasleft the room and has projected the deadbolt 4: by means of the guestkey, the parts of the lock before projection being in the position shownin Fig. 1 of the drawings. The person in authority, as, for instance,the hotel clerk or manager on being requested to dead lock the bolt inthe guests room then operates the appropriate circuit closer, theelectro-magnets 33 are energized, attracting the latching armature 36,moving the same away from holding engagement with the forward bevelededge 31 of the blocking dog. The coiled spring 32 will then force thedog downwardly to bring its blocking lug 30 in the rear of the shoulder28 of the dead bolt (see Fig. It will be obvious that in this positionretraction of the dead bolt through any of the keys of the series whichoperate the roll-back 24 only is prevented inasmuch as the blocking dog28 lies in a different plane from the rollback 24, and inasmuch as thekeys of this series cannot operate the second roll-back 25 to positionit to engage the rear end of its blocking dog. Some person in authority,however, with the long key may rotate the same to engage said rear end,the beveled forward edge 31 of the dog riding up over the lower edge ofthe latching armature 36 and forcing the same inwardly against itsspring 39 until said edge 31 has cleared and is in alinement with thelatching window 38 of said armature, whereupon the spring 39 will snapthese two parts in engagement and hold the blocking dog thusinoperatively positioned until the electro-magnet is again energized.Continued rot.tion of the roll back 25, and, of course, of the firstroll-back 24 which rotates therewith, will then retract the dead boltand the guest may then enter his apartment. v

I have herein referred to a specific form of dead bolt and thumb turnmechanism and of cylinder lock mechanism cooperating therewith, butdesire it understood that the present invention is not limited tocooperation with these specific forms, but may be embodied in connectionwith any form of lock of the same general type or of similar typeswherein the essential elements of control exist, and especially the twokey-controlled mechanisms typified by the roll-backs 2st and 25. It willalso be obvious that the invention is not limited to the specific formof electric controlling mechanism herein clescribed, but that the samemay be varied structurally and in relative arrangement of parts withinthe spirit of the invention and the scope of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In a look, a dead bolt, means controlled by a plurality of keys forprojecting and retracting said dead bolt, means under electric controlfor blocking the retraction of said bolt through certain of said,

plurality of keys, and means controlled and operable by one certain keyof said plurality of keys to render said blocking means inoperative.

2. In a lock, a dead bolt, key-controlled means for projecting andretracting the same, means under electric control for blocking theretraction of said bolt through said. key-controlled means, and otherkey-controlled means for rendering said blocking means inoperative andfor retracting said bolt.

3. In a lock, a dead bolt, key-controlled means for projecting andretracting the same, movable means normally tending to block theretraction through said key-controlled means of said dead bolt whenprojected, means for holding said blocking means in inoperativeposition, means under electric control fOr operating said holding meansto release said blocking means, and other key-controlled means arrangedto inoperatively position said blocking means.

4. In a look, a dead bolt, key-controlled means for projecting andretracting the same, movable means normally tending to block theretraction through said key-controlled means of said dead bolt whenprojected, means for holding said blocking means in inoperativeposition, means under electric control for operating said holding meansto release said blocking means, and other key-controlled means arrangedto inoperatively position said blocking means and to retract said bolt.

5. In a look, a dead bolt, key-controlled means for projecting andretracting said dead bolt, a movable blocking member, means normallytending to position said member to cooperate with said dead bolt andblock the retraction thereof through said key-controlled means, latchingmeans for holding said blocking member inoperatively positioned,electrically controlled means for operating said latching means torelease said blocking member, and other key-controlled means adapted tomove said blocking member from operative to inoperative position and toretract said dead bolt.

6. In a lock, a dead bolt, means operable by a series of keys to projectand retract said dead bolt, movable blocking means normally tending tocoiiperate with said bolt to block the retraction thereof through saidkey-controlled means, means for holding said blocking means ininoperative position, means under electric control for operating saidholding means to release said blocking means, and means operable by acertain key only to inoperatively position said blocking means and toretract said dead bolt.

7. In a look, a dead bolt, key-controlled means for projecting andretracting said &

dead bolt, an abutment on said dead bolt, a movable blocking member,means normally tending to position said member to cooperate with saidabutment and block the retraction of said bolt through saidkey-controlled means, an electro-magnet, a latching armature cooperatingtherewith and arranged to engage said blocking member to hold the samein inoperative position, means normally tending to hold said armature inlatchengaging position, said armature upon the energizing of saidelectro-magnet being HENRY Gr. VOIGHT.

WVitnesses:

E. E. MORSE, FLORENCE G. HADLEY.

Copies of this patent maybe obtained for five cents each, by addressingthe Commissioner of I'atents,

Washington, D. G.

